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Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance

The solubility range of interstitial Ni in the ZrNi(1+x)Sn half-Heusler phase is a controversial issue, but it has an impact on the thermoelectric properties. In this study, two isothermal section phase diagrams of the Zr-Ni-Sn ternary system at 973 K and 1173 K were experimentally constructed based...

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Autores principales: Li, Xiaofang, Yang, Pengbo, Wang, Yumei, Zhang, Zongwei, Qin, Dandan, Xue, Wenhua, Chen, Chen, Huang, Yifang, Xie, Xiaodong, Wang, Xinyu, Yang, Mujin, Wang, Cuiping, Cao, Feng, Sui, Jiehe, Liu, Xingjun, Zhang, Qian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AAAS 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013278/
https://www.ncbi.nlm.nih.gov/pubmed/32055798
http://dx.doi.org/10.34133/2020/4630948
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author Li, Xiaofang
Yang, Pengbo
Wang, Yumei
Zhang, Zongwei
Qin, Dandan
Xue, Wenhua
Chen, Chen
Huang, Yifang
Xie, Xiaodong
Wang, Xinyu
Yang, Mujin
Wang, Cuiping
Cao, Feng
Sui, Jiehe
Liu, Xingjun
Zhang, Qian
author_facet Li, Xiaofang
Yang, Pengbo
Wang, Yumei
Zhang, Zongwei
Qin, Dandan
Xue, Wenhua
Chen, Chen
Huang, Yifang
Xie, Xiaodong
Wang, Xinyu
Yang, Mujin
Wang, Cuiping
Cao, Feng
Sui, Jiehe
Liu, Xingjun
Zhang, Qian
author_sort Li, Xiaofang
collection PubMed
description The solubility range of interstitial Ni in the ZrNi(1+x)Sn half-Heusler phase is a controversial issue, but it has an impact on the thermoelectric properties. In this study, two isothermal section phase diagrams of the Zr-Ni-Sn ternary system at 973 K and 1173 K were experimentally constructed based on the binary phase diagrams of Zr-Ni, Zr-Sn, and Ni-Sn. The thermodynamic equilibrium phases were obtained after a long time of heating treatment on the raw alloys prepared by levitation melting. Solubilities of x < 0.07 at 973 K and x < 0.13 at 1173 K were clearly indicated. An intermediate-Heusler phase with a partly filled Ni void was observed, which is believed to be beneficial to the lowered lattice thermal conductivity. The highest ZT value~0.71 at 973 K was obtained for ZrNi(1.11)Sn(1.04). The phase boundary mapping provides an important instruction for the further optimization of ZrNiSn-based materials and other systems.
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spelling pubmed-70132782020-02-13 Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance Li, Xiaofang Yang, Pengbo Wang, Yumei Zhang, Zongwei Qin, Dandan Xue, Wenhua Chen, Chen Huang, Yifang Xie, Xiaodong Wang, Xinyu Yang, Mujin Wang, Cuiping Cao, Feng Sui, Jiehe Liu, Xingjun Zhang, Qian Research (Wash D C) Research Article The solubility range of interstitial Ni in the ZrNi(1+x)Sn half-Heusler phase is a controversial issue, but it has an impact on the thermoelectric properties. In this study, two isothermal section phase diagrams of the Zr-Ni-Sn ternary system at 973 K and 1173 K were experimentally constructed based on the binary phase diagrams of Zr-Ni, Zr-Sn, and Ni-Sn. The thermodynamic equilibrium phases were obtained after a long time of heating treatment on the raw alloys prepared by levitation melting. Solubilities of x < 0.07 at 973 K and x < 0.13 at 1173 K were clearly indicated. An intermediate-Heusler phase with a partly filled Ni void was observed, which is believed to be beneficial to the lowered lattice thermal conductivity. The highest ZT value~0.71 at 973 K was obtained for ZrNi(1.11)Sn(1.04). The phase boundary mapping provides an important instruction for the further optimization of ZrNiSn-based materials and other systems. AAAS 2020-01-30 /pmc/articles/PMC7013278/ /pubmed/32055798 http://dx.doi.org/10.34133/2020/4630948 Text en Copyright © 2020 Xiaofang Li et al. http://creativecommons.org/licenses/by/4.0/ Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0).
spellingShingle Research Article
Li, Xiaofang
Yang, Pengbo
Wang, Yumei
Zhang, Zongwei
Qin, Dandan
Xue, Wenhua
Chen, Chen
Huang, Yifang
Xie, Xiaodong
Wang, Xinyu
Yang, Mujin
Wang, Cuiping
Cao, Feng
Sui, Jiehe
Liu, Xingjun
Zhang, Qian
Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance
title Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance
title_full Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance
title_fullStr Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance
title_full_unstemmed Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance
title_short Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance
title_sort phase boundary mapping in zrnisn half-heusler for enhanced thermoelectric performance
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013278/
https://www.ncbi.nlm.nih.gov/pubmed/32055798
http://dx.doi.org/10.34133/2020/4630948
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